Heat transfer on rotating channel with various heights of pin-fin

Jun Su Park, Kyung Min Kim, Dong Hyun Lee, Hyung Hee Cho, Minking K. Chyu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

29 Citations (Scopus)


Pin-fins have been used to enhance the heat transfer near the trailing edge of a turbine airfoil. Previous pin-fin heat transfer studies focused mainly on the array geometry of pin height-to-diameter equal to unity in a stationary frame. This study experimentally examines the effects of pin height-to-diameter ratio (Hp/Dp) from 2 to 4 and rotation number (Ro) from 0 to 0.2. The tested model used a staggered pin-fin array with an inter-pin spacing of 2.5 times the pin-diameter (S/D=2.5) in both longitudinal and transverse directions. Detailed heat/mass transfer coefficients were measured using the naphthalene sublimation technique with a heat-mass transfer analogy. The data measured suggest that an increase in Hp/Dp increases the level of array heat/mass transfer. Array averaged Sherwood numbers for Hp/Dp = 3 and Hp/Dp = 4 are approximately 10% and 35% higher than that of Hp/Dp = 2. The effect of rotation induces notable difference in heat/mass transfer between the leading surface and the trailing surface. The heat transfer coefficients change a little although the rotating number increases in the tested range because the pin-fins break the rotation-induced vortices.

Original languageEnglish
Title of host publication2008 Proceedings of the ASME Turbo Expo
Subtitle of host publicationPower for Land, Sea, and Air
Number of pages8
EditionPART A
Publication statusPublished - 2008
Event2008 ASME Turbo Expo - 2008 ASME Turbo Expo, Germany
Duration: 2008 Jun 92008 Jun 13

Publication series

NameProceedings of the ASME Turbo Expo
NumberPART A


Other2008 ASME Turbo Expo
City2008 ASME Turbo Expo

All Science Journal Classification (ASJC) codes

  • General Engineering


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